MAX4764A Maxim, MAX4764A Datasheet - Page 8
MAX4764A
Manufacturer Part Number
MAX4764A
Description
The MAX4762–MAX4764/MAX4764A/MAX4765 dual
SPDT (single-pole/double-throw) switches feature negative
signal capability that allows signals below ground to
pass through without distortion
Manufacturer
Maxim
Datasheet
1.MAX4762.pdf
(15 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX4764AETB+T
Manufacturer:
MAXIM/美信
Quantity:
20 000
The MAX4762–MAX4764/MAX4764A/MAX4765 are low
on-resistance, low-voltage, dual SPDT analog switches
that operate from a +1.8V to +5.5V supply and are fully
specified for nominal 3.0V applications. The devices
feature a negative signal capability that allows signals
below ground to pass through without distortion and
have break-before-make switching.
The MAX4763/MAX4765 feature a comparator that can be
used for headphone or mute detection. The comparator
threshold is internally generated to be approximately 1/3
of V
internal shunt switch to discharge any capacitance at the
NO and NC connection points. This reduces the click-
and-pop sounds that occur when switching audio signals.
The MAX4762–MAX4764/MAX4764A/MAX4765 logic
inputs accept up to +5.5V, regardless of supply voltage.
For example, with a +3.3V supply, IN_ can be driven low
to GND and high to +5.5V allowing for mixing of logic
levels in a system. Driving IN_ rail-to-rail minimizes
power consumption. For a +1.8V supply voltage, the
logic thresholds are 0.5V (low) and 1.4V (high); for a
+5V supply voltage, the logic thresholds are 0.8V (low)
and 2.0V (high).
Low-Voltage, Dual SPDT, Audio Clickless
Switches with Negative Rail Capability
Figure 1. Typical Operating Circuit
8
MUTE
SOURCE 1
SOURCE 2
_______________________________________________________________________________________
AUDIO
AUDIO
CC
. The MAX4764/MAX4764A/MAX4765 feature an
OUT+
OUT-
OUT+
OUT-
CMPO
NC1
NO1
NC2
NO2
Applications Information
Detailed Description
MAX4765
SHUNT
SWITCH
Digital Control Inputs
V+
3
COM1
IN1
IN2
COM2
CMP-
V+
INPUT
SELECT
MUTE
BUTTON
8
SPEAKER
The on-resistance of the MAX4762–MAX4764/
MAX4764A/MAX4765 changes very little for analog input
signals across the entire supply voltage range (see the
Typical Operating Characteristics). The switches are bidi-
rectional, so the NO_, NC_, and COM_ pins can be either
inputs or outputs.
The MAX4762–MAX4764/MAX4764A/MAX4765 pass
signals as low as V
ground with minimal distortion.
The MAX4763/MAX4765 include a comparator that can
be used for mute and headphone detection functions.
The positive terminal of the comparator is internally set to
V
threshold, the comparator output (CMPO) is a logic high.
When CMP- rises above V
The comparator threshold of V
of headphones because headphone audio signals are
typically biased to V
The 100
MAX4765 automatically discharge any capacitance at
the NC_ or NO_ terminals when they are unconnected
to COM_. This reduces audible click-and-pop sounds
that occur when switching between audio sources.
Audible clicks and pops are caused when a step DC
voltage is switched into the speaker. By automatically
discharging the side that is not connected, any residual
DC voltage is removed, thereby reducing the clicks
and pops.
Caution: Do not exceed the absolute maximum ratings
since stresses beyond the listed ratings may cause
permanent damage to the device.
Proper power-supply sequencing is recommended for
all CMOS devices. Always apply V
analog signals, especially if the analog signal is not
current-limited.
For the latest application details on UCSP construction,
dimensions, tape carrier information, printed circuit board
techniques, bump-pad layout, and recommended reflow
temperature profile, as well as the latest information on
reliability testing results, go to the Maxim’s website at
www.maxim-ic.com/ucsp and search for the Application
Note, “UCSP—A Wafer-Level Chip-Scale Package.”
CC
/ 3. When the negative terminal (CMP-) is below the
UCSP Applications Information
shunt switches on the MAX4764/MAX4764A/
Comparator (MAX4763/MAX4765)
(MAX4764/MAX4764A/MAX4765)
Power-Supply Sequencing and
CC
CC
/ 2.
- 5.5V, including signals below
CC
Overvoltage Protection
Analog Signal Levels
/ 3, CMPO is a logic low.
CC
/ 3 allows for detection
CC
Shunt Switch
before applying